To learn more about the ornament, see the linked paper by the author, 

"A Short Note on the Glagolitic Ornament in Pamvo Berynda's Triod Cvetnaya (Kiev 1631)". 

Pamvo Berynda’s famous „Leksikon Slavenorōsskij“ (1627 and 1653) can be found at Archive.org

Berynda’s types used in the printed editions of the Lexikon see here

Berynda in the Wikipedia: dt - en - ru - ukr